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Allen & Heath Qu-SB Portable 18-In/14-Out Remote Controlled Digital Mixer

SKU: AHQUSB MFR: QU-SB
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Key Features

  • Achieve pristine audio quality with this digital mixer's studio-grade preamps.
  • Remotely control this digital audio interface via iPad for flexible mixing on the go.
  • Enjoy low latency performance, ideal for live recording and real-time audio processing.
  • Seamlessly integrate with your existing setup using versatile input/output connectivity.
  • This Allen & Heath mixer ensures driver stability for worry-free recording sessions.
  • Get professional mixing capabilities at an affordable price with the Allen & Heath Qu-SB.
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Special Order?Estimated to Ship: 08/19/2025
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Allen & Heath Digital Mixer Specifications

  • Mic/Line Inputs

    Balanced, XLR and 1/4" TRS jacks, fully recallable
    Input Sensitivity: -60 to +5dBu / -50 to +15dBu (XLR / TRS)
    Analog Gain: -5 to +60dB, 1dB steps
    Maximum Input Level: +19 / +29dBu
    Input Impedance: >5 kOhms (XLR), >10 kOhms (TRS)
    THD+N, Unity Gain 0dB: 0.0005%, -89dBu (20Hz to 20kHz, direct out at 0dBu, 1kHz)
    THD+N, Mid Gain +30dB: 0.001%, -83dBu (20Hz to 20kHz, direct out at 0dBu, 1kHz)

  • Stereo Line Inputs

    ST1 Connector: Balanced, 6.3mm / 0.25" TRS jacks, half-normalled
    Input Sensitivity (ST1): +4 /0dBu, nominal
    Trim: +/-24dB
    Maximum Input Level (ST1): +22 /+18dBu
    Input Impedance: >7kOhms

  • Line Outputs

    Mix 1 to 10 & LR Out: Balanced XLR
    Output Impedance: <75Ohms
    Nominal Output: +4dBu = 0dB meter reading
    Maximum Output Level: +22dBu
    Residual Output Noise: -90dBu (muted, 20Hz to 20kHz)

  • Stereo Output

    MTX 1-2: Balanced 6.3mm / 0.25" TRS jacks
    Source (Alt Output/2 Trk Output): Patchable/LR post fade
    Output Impedance: <75Ohms
    Nominal Output: +4dBu = 0dB meter reading
    Maximum Output Level: +22dBu
    Residual Output Noise: -90dBu (muted, 20Hz to 20kHz)

  • dSNAKE: Inputs

    Remote source for CH1-32, ST1, ST2, ST3

  • dSNAKE: Outputs

    Patchable from Mix 1-10, LR, Grp 1-8, MTX 1-4
    Compatible with AudioRacks AR2412, AR84, AB168
    Compatible with ME personal mixing system

  • System: Dynamic Range

    112dB

  • System: Frequency Response

    20Hz to 20kHz (+0/-0.5dB)

  • System: Headroom

    +18dB

  • System: Operating Level

    Internal Operating Level: 0dBu

  • System: Alignment

    dBFS: +18dBu = 0dBFS (+22dBu at XLR output)

  • System: Calibration

    Meter Calibration: 0dB meter = -18dBFS (+4dBu at XLR output)

  • System: Indicators

    Meter Peak Indication: -3dBFS (+19dBu at XLR out), multi-point sensing
    Meter Signal Indication: -48dBFS (-26dBu at XLR out)
    Meter Type: Fast (peak) response

  • System: Sampling Rate

    48kHz +/-100PPM

  • System: Converters

    24-bit Delta-Sigma

  • System: Latency

    1.2ms (local XLR in to XLR out)
    0.7ms (local XLR in to AES out)

  • System: Operating Temperature

    32 to 95 deg. F (0 to 35 deg. C)

  • System: Power

    Mains Power: 100-240V AC, 50/60Hz, 150W maximum

  • USB Audio

    Qu-Drive: USB A
    Device: Use a USB hard drive (not a USB key)
    Stereo Record: 2-channel, WAV, 48kHz, 24-bit, patchable
    Stereo Playback: 2-channel, WAV, 44.1 or 48kHz, 16 or 24-bit, to ST1
    Multitrack Record: 18-channel, WAV, 48kHz, 24-bit, patchable
    Multitrack Playback: 18-channel, WAV, 48kHz, 24-bit
    USB Audio Streaming: USB B, Core Audio compliant
    Send (upstream): 32-channel, WAV, 48kHz, 24-bit
    Return (downstream): 32-channel, WAV, 48kHz, 24-bit

  • Controls: Softkeys

    10

  • Controls: Groups

    Mute Groups: 4
    DCA Groups: 4

  • Controls: Network

    TCP/IP Ethernet for MIDI commands and iPad app

  • Input Processing: Source

    Channels 1 to 32: Local, dSNAKE, or USB
    ST1, ST2: Local, dSNAKE, or USB
    ST3: Local, dSNAKE, or USB Stereo
    USB Global Source: Qu-Drive or USB B Streaming

  • Input Processing: Stereo Linking

    Stereo Linking: Odd/even input pairs
    Parameters Linked: EQ, dynamics, insert, delay, assignments, sends
    Link Options: Preamp, polarity, sidechains, fader, mute, pan

  • Input Processing: Polarity

    Normal & reverse

  • Input Processing: HPF

    12dB/octave, 20Hz to 20kHz

  • Input Processing: Insert

    Assign FX1-4 into input channels

  • Input Processing: Delay

    Up to 85ms

  • Input Processing: Gate

    Self-key sidechain
    Threshold: -72 to +18dBu
    Depth: 0 to 60dB
    Attack: 50Mus to 300ms
    Hold: 10ms to 5s
    Release: 10ms to 1s

  • Input Processing: Equalizer

    4-band fully parametric, 20Hz to 20kHz, +/-15dB
    Band 1: Selectable LF shelving (Baxandall), bell
    Band 2 & 3: Bell
    Band 4: Selectable HF shelving (Baxandall), bell
    Bell Width: Non-constant Q, variable, 1.5 to 1/9 octave

  • Input Processing: Compressor

    Self-key sidechain
    Threshold: -46 to 18dBu
    Ratio: 1:1 to infinity
    Attack: 300Mus to 300ms
    Release: 100ms to 2s
    Knee: Soft or Hard
    Types: Peak manual, RMS manual, SlowOpto, Punch Bag

  • Mix Processing: USB Output

    Channel Direct Out to USB: Follow fader, follow mute (global options)
    Source Select (Global): Post-preamp, pre-EQ, post-EQ, post-delay

  • Mix Processing: Insert

    Assign FX into Mix channels

  • Mix Processing: Delay

    Up to 170ms

  • Mix Processing: Equalizer

    Graphic EQ: Constant 1/3 octave, 28 bands from 31Hz to 16kHz, +/-12dB
    Parametric EQ: 4-band fully parametric, 20Hz to 20kHz, +/- 15dB
    Band 1: Selectable LF shelving (Baxandall), bell
    Band 2 & 3: Bell
    Band 4: Selectable HF shelving (Baxandall), bell
    Bell Width: Non-constant Q, variable, 1.5 to 1/9 octave

  • Mix Processing: Compressor

    Self-key sidechain
    Threshold: -46 to 18dBu
    Ratio: 1:1 to infinity
    Attack: 300Mus to 300ms
    Release: 100ms to 2s
    Knee: Soft or Hard
    Types: Peak manual, RMS manual, SlowOpto, Punch Bag

  • Mix Processing: Effects

    Internal FX: 4x RackFX engines, Send>Return or Inserted
    Types: Reverbs, delays, gated reverbs, ADT, chorus, symphonic chorus, phaser, flanger
    4x Dedicated Stereo FX Returns: Fader, pan, mute, routing to Mix/LR, 4-band PEQ

  • Audio Tools: PAFL

    PFL or stereo in-place AFL
    0 to -24dB trim
    85ms delay

  • Audio Tools: Talkback

    Assignable to any mix
    12dB/octave HPF

  • Audio Tools: Signal Generator

    Assignable to any mix
    Sine, white, pink, bandpass noise

  • Audio Tools: RTA

    31-bands, 1/3 octave 20Hz to 20kHz
    Follows PAFL source

  • Rack Height

    4U

  • Dimensions (W x D x H)

    Desk mounted: 17.1 x 6.9 x 6.3" (434.34 x 175.26 x 160.02mm)
    Rack mounted: 19.0 x 5.3 x 7.0" (482.60 x 134.62 x 177.80mm)

  • Weight

    12.7lbs (5.76kg)

About Allen & Heath Digital Mixer

Portable 18 In / 14 Out Digital Mixer With Remote Wireless Control
Qu-SB is an ultra-compact digital mixer and interface designed for iPad control, freeing you to mix from anywhere in the venue and providing a smart, portable solution for bands, AV and installation. The companion Qu-Pad app is a beautifully elegant, intuitive mixing interface, giving easy access to the full wealth of Qu features and setup options.

On top of its 18 onboard inputs and 14 outputs, Qu-SB can be expanded up to 32 mono inputs and 24 outputs by connecting to one of their family of remote AudioRacks over a single Cat5 cable. Couple this with the Qu-You personal monitoring app for Android and iOS, plus the ME-1 personal mixers and Qu-SB is a fantastic choice for bands looking for the same great monitor sound wherever they play.

• 16 Mono Inputs (TRS + XLR)
• 1 Stereo Input (TRS)
• 12 on-board Mix Outputs (LR, Mono Mix 1-4, Stereo Mix 1-3)
• 1 Stereo Matrix Out (TRS)
• Qu-32 Core inside (32 Mono + 3 Stereo Input Channels)
• Up to 11 Monitor Mixes (4 mono + 7 stereo)
• 4 FX Engines
• 4 FX Sends / Returns
• 4 Mute Groups
• 4 DCA Groups
• Recallable AnaLOGIQ Preamps
• iLive FX Library
• dSNAKE Remote Audio Port expansion up to 38 inputs
• Automatic Mic Mixer
• 32x32 USB Audio Interface
• Qu-Drive direct Multitrack Recording / Playback on USB drives
• Compatible with ME Personal Mixing System
• Qu-Pad iPad App
• Qu-You iPhone / Android personal monitoring app
• Trim, polarity, HPF, gate, insert / ducker, 4-band PEQ, compressor and delay on all Inputs
• Insert, 1/3 octave GEQ, 4-band PEQ, compressor and delay on all Mix outputs
• Built-in Signal Generator
• RTA with Peak Band indication
• 19" Rack Mountable with optional rack ears
• Qu-Pad Mixing App

Having massive processing power and advanced functionality is great, but it counts for nothing if you can't access the controls you need in a heartbeat. Qu-SB is designed to integrate seamlessly with the Qu-Pad iPad app, providing super-fast, easy access to all settings, including channel processing, meters and RTA views, FX racks, scene management, USB audio control, setup menus and much more. Qu-Pad connects to the mixer over Wi-Fi and gives you the freedom to adjust the monitors on stage, roam around the venue whilst tweaking the PA and then mix the show from the heart of the audience.

AnalogiQ Preamps
Qu-SB's sixteen AnalogiQ total recall preamps feature zero crossing detection and an advanced padless 1dB step gain stage, closely allied to the DSP for optimal gain accuracy and audio transparency. The analogue signal is captured by high class, low latency 24bit analogue to digital converters matched to high quality 24bit digital to analogue converters to deliver the required outputs. The AnalogiQ design has been refined over many months to offer superb transparency, minimal distortion and an ultra-low noise floor, with a warm, musical sound that is missing from some digital consoles.

QU-Drive
Forget soundcard drivers and software setup, Qu has an integrated multitrack USB recorder, providing 18 channels of 48kHz, 24bit recording and playback straight to / from your USB hard drive. Capturing multitrack recordings of your shows has never been so easy. Mixes and FX returns can be recorded alongside channels and multitrack audio can be played back to the mixer for virtual sound-checks.

An independent set of controls is provided for quick stereo recording of the main LR or other mix outputs and a 2-track USB return can be routed to ST3 for playback of stereo WAV files such as walk-in music.

iLive Fx
Qu-SB's dynamics and FX algorithms are derived from the FX used in the iLive pro touring series. Some of the world's most respected audio engineers have chosen to use iLive's FX on tour in preference to top-end plug-ins and external FX units. Qu-SB boasts 4 stereo iLive FX engines, featuring lovingly crafted emulations of legendary classic reverbs, gated reverbs, delays, modulators, flangers and more.

Automatic Mic Mixer
AMM is vital in applications such as conferences, meetings and panel discussions where a number of microphones are open at the same time, reducing background noise and minimizing the risk of feedback. The Automatic Microphone Mixer feature helps the engineer to manage the levels of multiple mic inputs, ensuring that each speaker's contribution is heard. The D-Classic dynamic gain sharing algorithm is inspired by industry standard automixers. Up to 16 microphone sources can be mixed at once, with each channel having a priority setting which determines its 'weight' in the total system gain.

USB Audio Streaming
Qu's built-in interface streams multitrack audio to your Mac or PC via a flexible patching system: all Input channels and the Main LR can be recorded at the same time or you may choose to record something different such as FX returns or a pair of mixes. The returns from the computer can be assigned to the Input channels. The interface is class-compliant on Mac OS X - and drivers are available for Windows systems. Either way, it will be recognized straightaway by any DAW supporting ASIO or Core Audio, including Logic, Cubase, Reaper and Pro Tools.

Qu-SB can be expanded to up to 38 inputs via dSNAKE, allowing a convenient Cat5 connection to a combination of remote AB168, AR2412 or AR84 AudioRacks. dSNAKE is their proprietary networking solution, boasting a transport latency of only 105us over cable runs of up to 120m / 390'. The AudioRacks unleash all the power of Qu-SB, giving you access to extra outputs for Stereo Matrix, Groups or extra monitor Mixes.

Warranty Information

This product has a limited warranty of 12 months.

Product Documents

User Manual

Key Features

  • Achieve pristine audio quality with this digital mixer's studio-grade preamps.
  • Remotely control this digital audio interface via iPad for flexible mixing on the go.
  • Enjoy low latency performance, ideal for live recording and real-time audio processing.
  • Seamlessly integrate with your existing setup using versatile input/output connectivity.
  • This Allen & Heath mixer ensures driver stability for worry-free recording sessions.
  • Get professional mixing capabilities at an affordable price with the Allen & Heath Qu-SB.

What's in the box:

  • Allen & Heath Qu-SB 18-In/14-Out Remote Controlled Digital Mixer
  • Mains Lead
  • Getting Started Guide
  • Safety Sheet
  • IEC Power Cord
  • Allen & Heath 1 Year Limited Warranty